Acoustic system testing device



FIG. 1 is a perspective view;

FIG. 2 is a rear elevational view;

FIG. 3 is a top elevational view;

FIG. 4 is a right side elevational view;

FIG. 5 is a left side elevational view;

FIG. 6 is a front elevational view; and,

FIG. 7 is a bottom elevational view.

The portions of the drawings shown in broken lines illustrate environment and form no part of the claimed design. 

The ornamental design for an acoustic-system testing device, as shown and described. 